Point out that test/data is not bundled.

diff --git a/README b/README
index 215de4f9160e959534945fa640a8107c5d19f2ce..bdad78424ce122f8553ca09892b47c339c44132e 100644 (file)
--- a/README
+++ b/README
@@ -86,6 +86,10 @@ Run internal unit tests with::
 
     $ nosetests --with-doctest --doctest-tests igor test
 
+The data in the ``test/data`` directory is in the Git repository, but
+it is not bundled with the source code.  If you want the test data,
+you'll have to clone the Git repository or download a snapshot.
+
 Licence
 =======